Balance for oven doors



May 520, 1930.

. J. w. HEARL BALANCE FOR ovsu moons 3 sheets-sneak 1 Filed June 15. 1928 gmwnto v May 20, 1930.

J. W l -{EARL B ALINCE FOR OVEN DOORS Fihd June 15, 1923 s sheet -sn g 2II III a: llllll l l l l ldq May 20, 1930. J. w. HEARL BALANCE FOR 0323D'ooRs.

Fild June 15, 1928 s Sheets-Sheet s Patented May 20, 1930 JOHN W. HEARL,OF BALTIMORE, MARYLAND, ASSIGNOR TOA. WEISKITTELK: SON

00., or BALTIMoREjMARYLANn,

A. CORPORATION OF DELAWARE."

snmmonron ovEN DOORS Application filed June 15, 1928. Serial a... 25,514.

This invention relates to improvements in door hangings and balancesfforcook ng ovens.

One object of the invention is to provide an improved Construction ofhanger for an oven-door whereby when the latter is swung down to ahorizontal open position, it will beyieldingly'checlredl Another objectis to provide an improved construction of balance'for oven doors whichwill be completely concealed, and

A further object is to provide an adjustment for 'oVe'n doOr balanceswhich'will be lo'cated on the outer sidev of the oven and removed fromthe intense heat therein whereby more uniform accuracy in the balancemay be maintained. r

" With these, and other objects in; view, the

. invention is illustrated in the accompanying drawings, wherein,

Fig. 1 shows a gasrange in front elevat on embodying my invention; i

' Fig. 2'illustrates a vertical-sectional detail on an enlarged scale,taken through the'oven structure'on the line 2'-2 ofF-ig. 1;

Fig. 3 shows another vertical's'ectional detail through the oven with"the inner side wall of the oven rcn'o'oved Fig. 4 illustrates a'horizontal cross-seetional detail through the oven,''the section beingtaken on the'line' 4%4 of Fig. -3"hut' with the inner o'venwa'lls inplace.

Fig: 5 shows a diagrammatic PBISPGClJlVB In the structure shown,thej'invention' is 'suflicient thickness tO PI V I' B t es applied to anoven ofagas 'range ofconven tional form wherein the cookingtop l3 islo'eated 'at' oneside of 'th'e oven with the usual gas 'suppl'y pipelflifand burner valves shown'infront elevation in-i Fig; 1 ofth'e'drawings.

perspective, the de The particular construction of' the oven is notessential to the'invention, but in this'instance, there are upper andlower oven chain bers 16=and17 separated bysuitable 'parti tions 18, 19and 20 which latter form respec: tively a bottom for the upperchamberjjan air-space and a top for the lowerch'amber.

'A rear vertical plate provides ade'ad air-space at the rear "of-theoven-chambers, while side plates 21 and 22' servethe same function atopposite sides so as to produce one vertical sideair-sp'ace 23" atones'ide and another vertical side air space "24catpthe opposite side ofthe oven-chambers.

A top-plate 25 also produces an air-space over the upper oven chamber. Abottom- 26 is provided in the lower oven-chamber.-

The entirefrontoftheoVen from the top of the upper chamber to theb-ott'om'of thev lower chamber is closed by a front cast metal frame 27which is shown detached and in perspective in Fig. 6- of the drawing."-

It is not essential to the invention as to just how the oints aree'fl'ected'between the walls and to the top by bolts 29, as showninFigs. 3 and 4 of the drawings.

The bottom of the front frame has-a depending flange 30 which projectsdown on the inner side of the band. or strap12'as can beseen in Figs. 2and 30f the drawingsi 31 and a lower opening 32 horizontal cross-bar 33.

a Each upper and lower opening is providecl with a door-receivingrecess'34 with top, side and. bottom "stop-flanges 35,? and in theopposite lower corners of the said'open ings, the side and bottomstopflangesare cut away to forma notch 3.6 andtozalsoenable a roundedbearing face 37 to be formed onthe upper sides and-ends of thecross-bar33 at said corners, for apurpose that will presently beexplained.

The doors 38, are of the drop type,.inithat each is mounted at itsloweredge to the front frame and swings down to a horizontal position atsaid front openings.

The doors 38 have two side bars 39, whose inner ends project beyond theinner edge 40 of thedoor proper, as clearly shown in Fig;

' .5 and each of these inner projecting ends has a bearing-head 41 witha rounded bearing notch 42 at its under side and with a stopshoulder 43at its upper side and slightly to the rear of said notch.

The bearing-notch 42 in each head corresponds in shape to and fits andseats upon the bearing-faces 37 at the end of the cross-bar 33 of thefront frame, while the rear edge of each notch has a hook formation 44which extends around the bearing face .37 far enoughto prevent the door,from drawing forward and becoming disengaged from said bearing faceswhen the door is swung down,

as shown in Fig. 3 of the drawings.

- When the; doors are in place, the bearing 7 heads 41extend through thenotches 36 ber neath the vertical side stop-flanges 35, and

' door has a laterally-projecting pin 47 while the bearing-head 41 atthe opposite side of 'the lower oven-door has asimilar lateral pin48,the purpose of which 48 will presently 'be explained. Below thebottom 26 of the lower oven-and pins 147 and V securedagainst-theloutermost side wallsare its two stud-plates 49 and 50respectively.

These stud-plates 49- and 50 are located at opposite sides andnear thefront of the'oven structure but directlybeneath the side air spaces 23.and 24.

The plate 49 has a stud 51 while the plate 50 has a stud 52,.and thesestuds carry levers 53 and 54 respectively whose functions are quitesimilar to those of bell-crank levers, as

' will presently more fully appear. I

- The bell-crank lever 53 has a rod '55,]connecting one end of it withthe stud-47, of bearing-head 41'on the'upper door while the bell-cranklever? 54 has a short link-rod-56,

; p n ct ng ity and the stud 48 of the bearing-head on the lowerdoor.

' It will be understood that the lever and :rod connectionto the upperdoor is at the left-hand side of the oven and door while the lever androd connection to the lower door is atthe right-hand side of the ovenand door so that one connectionwill' not ink terfere withthe other. a

The bell-crank lever 53 hasits other end connected to a coil spring 57while. bell;

crank lever 54 has its other end connected to a similar coiled spring58. j i

These twocoiled springs 57 and 58extend horizontally beneath the bottom25 of the lower oven in a direction from front to rear of the ovens andthe rear ends of these springs are attached to screw-threaded rods 59which i extend rearwardly'andhorizontally and pass through the band orstrap 12 at the rear of the stove. YVing nuts 60 are provided on therear ends of the rods 59', at the outer side of the strap whereby therods may be drawn rearwardly by adjusting the wing nuts at the rear ofthe stove and on the rod-ends to stretch the coil springs 57 more orless, and thereby adjust the tension of the latter.

57 and 58 are connected indirectly to the upperv and lower ovendoors'respectively andiby pulling on the bellscrank levers 53 and 54,

and through them drawing the rods 55 and 56 downwardly serve as checkswhen the doors are opened and also serve, when the doors are closed,tofhold the latter in the closed positions.

It Will further be noted that the 10611 It will thus be seen that thecoiled springs cranks, hangers, springs and adjustable rods are'allremoved from the heatof the ovens wherethe tendency of the springsto expand 1 and contract is reducedto a ininimum and a 7 more uniformand constant pull is maintained.

It will further be seen that the adjusting a '95 wing-nuts 60 arealsolocated on the exterior of the stovejand at therear thereof wherethey are accessible for adjustment at anytime,

- so that these adjustments may. be made without detaching springcasings or removing oven linings. 7 .7

Having described my invention, I claim,-

1. In a stove oven structure the combinalllOIlWltll an oven withvertlcal air spaces'at opposite sides thereof, of an oven-front providedwith a door-opening which opening has bearing surfaces at opposite sidesof its lower edge, a door-having two side bars whose in ner ends projectinwardly beyond thehingeedge of the door proper and eachofsaidprojecting bar-ends. having. a bottom. 'edge;'

notch,'the said bottom edge-notches. engaging the side bearing surfacesat the lower edge of the oven-front door-openingand in ver-- 1 'ticalalinement with the air-spaces at the sides V V of the oven, 2.stud-plategsecured to the outer wall of the oven structure below theside I air-spaces, a bell-crankqlever carried on said stud-plate andmovable in a 'verticalgpl'an'e parallel with-said side air spaces,iaconnection between one end of the bell-crank lever and one projectingend; of af door above'it and a coiled spring extendingi'in' a direction"between the front and rear 'of the stove and 4 having its front endconnected'to the other end of the said bell-crank lever.

tion with outer and inner spaced walls form;

ing'an ovenwith vertical side airspacesbe tween the same and withhorizontal partitions to form an upper and aloweruoven-i 12s '2. Inastove oven structure "the combine 1 I I chamber, of a front for saidoven having upper and lower door-openings, a door for each of saidopenings and each door being hung at its lower edge so as to swing up toclose its opening and down to expose said openings and each door havingtwo side bars whose inner ends project inwardly beyond the hinge-edge ofthe door and form bearing heads the said bearing. heads extendingedgewise into the vertical air spaces at the sides of the ovens, astud-plate secured to one outer side wall below the lowermost oven andbelow the side air space at one side thereof, another stud plate securedto the other outer side Wall and also below the said lowermost oven andthe side air space at the opposite side of the oven, a bell-crank levercarried on each stud-plate and each lever swinging in a vertical planeparallel with the side Walls of the oven, a connection extendingupwardly from one end of one bell-crank lever at one side of one doorabove and engaging the bearing head of one door, a connection extendingupwardly from the other bell-crank lever and at the opposite side of thedoors and engaging the bearing-head on'the opposite side of another doorabove, two coiled springs ex tending horizontally between the front andback of the stove below the lower oven-chamber,*one spring havingposition directly beneath one side air space and the other directlybeneath the opposite side air space, and one spring engaging an end ofone bell-crank lever while the other engages an end of the otherbell-crank lever, separate rods engaging the other ends of said springsand each rod projecting rearwardlyto the back ofthe stove, and means atthe rear ends of said rods to adjust the same and vary the tension ofthe coiled springs.

In testimony whereof I afiix my signature.

JOHN W. HEARL.

